SavingStar, the first and only national, fully digital, grocery savings service, announced today a major update to both its SavingStar.com or on SavingStarsAndroid or iPhone mobile app. Users register their supermarket and drugstore loyalty cards from participating stores in their area and select the grocery deals that interest them. In addition to standard eCoupon rewards on products like Cheerios, Yoplait, and Pillsbury Cookie Dough, shoppers can now access SavingStars exclusive